The reversing lights switch
I20 is supplied
by the ignition-operated line (15/54) of relay T1 protected by fuse
F13 contained in the junction unit B2.
When reverse gear is engaged, the switch
closes and sends the supply to the reversing lights in the central
rear lights clusters: left
F35 and right F36, through the junction
unit B1 (pins 11 and 10 of connector A).
When reverse gear is engaged, a signal is
also sent to the interior electrochromic rearview mirror
P65
See
E3032
DOOR MIRROR ADJUSTMENT
.